The National Security Agency and Central Security Service are America’s code makers and breakers for the Army, Navy, Marine Corps, Air Force and Coast Guard. This website contains free games, puzzles, codes, ciphers and activities related to cryptology to educate and inspire the next generation of “mathematicians, linguists, engineers, and analysts.”

When you get to the site you can choose to view it in Flash (multi-media with sound and animation) or Text (printed copy only). Use the menu to explore:

*Codes & Ciphers – Learn the definition and history of codes and cipher. Use your math and logic skills to make your own cipher and learn how to break/decode ciphers.

*Games & Activities – Use math and logic to solve challenging brainteasers. Crack cryptograms using “substitution” or “transposition” ciphers. Make your own cipher machine from items found in your home. Use math, language, and memory skills to play some online games.

*Student Resources – Explore links to sites about the history of cryptology, see a photo gallery of cryptologists and the equipment they use. Check out the Cryptologic Museum. Read declassified top secret documents about the Korean War, Kennedy’s assassination, the Cuban Missile Crisis, and more. Learn about careers in the NSA along with high school and college programs and scholarships.

This is an engaging site that teaches, informs, and entertains while it helps students hone their math skills.